Central Management System and SNMP

Contents

• Why Network Management

• General Aspects on Network Management

• SNMP Simple Network Management Protocol

• Basic Function of SNMPFunction of Network

• Management via SNMP MIB Management Information Base

Why Network Management

Increasing network sizes need for navigation and monitoring tool

Increasing usage of intelligent hubs, bridges, routers, switches etc. to build structured networks complex and difficult to configure units have already integrated managment

Reduction and prevention of system downtimes

Fast and adequate reaction

Supervision of the whole network from a central point

Network Management - Existing Solutions

SNMP (Simple Network Management Protocol)

TNM (Telelecom Network Management)

SDH Management (via management bits in SDH protocol)

propriatry solutions (e.g. PANDATEL NMS based on VT100 terminal emulation)

SNMP - Simple Network Management Protocol

Basic idea: Network Management via Network itself

Using transport layer UDP and network layer IP with SLIP, PPP, Ethernet as transport medium / layer

Requires additional intelligence in network equipment

Unique network address (IP address) of each unit that is to be managed

Ethernet

Switch

SNMP Agent

SNMP Master

SNMP - Use of OSI Layers

Mmgt. Application e.g.HPOV GET Resp.

SET Resp.TRAP

GETSET

Application

UDPTransport UDP

IPNetwork IP

SNMP MIB II Enterprise MIBs

Session SNMP MIB II Enterprise MIBs

SLIP / PPP

Serial link

Ethernet

10BaseT, 10Base2

Physical&

Link

SLIP / PPP

Serial link

Ethernet

10BaseT, 10Base2

SNMP - Basic Function

Network Equipment including SNMP Software AGENT

Management Station including Management Software DOS PC or UNIX Workstation

At least 2 components are needed:

SNMP - Communication

SNMP Master

Ethernet Switch

SNMP Agent

Ethernet(10BaseT, 100 BaseT)

GETSET

TRAP

SNMP - Inband Management

SNMP Master

Ethernet Switch

SNMP Agent

GET / SET, TRAP

Ethernet(10BaseT, 100 BaseT)

SNMP - Outband Management

SNMP Master

Ethernet Switch

SNMP Agent

GET / SET, TRAP

Ethernet(10BaseT, 100 BaseT)

Serial link (SLIP / PPP)

Ethernet (10BaseT)

SNMP - General Tasks of the Network Mmgt. Station

Practical

Requests data from the agent

Sends configuration data to the agent

Reacts on Traps

Controls the managable unit(s)

Gathers information from the unit and delivers these to the Mgmt. Station on request

Generates Traps in case of unusual events

SNMP - General Tasks of the Agent

SNMP - MIBs

Database which contains all objects (variables) needed to control SNMP units

Aim: A general database which is independent from any protocol

Tree structure

Syntax: Abstract Syntax Notation One (ASN.1)

SNMP - MIBs

Global MIBs

Implemented in all SNMP agents and management systems

Contain general objects

Private MIBs

Contain specific objects of certain manufacturers

Contain specific objects of certain units

Are delivered with the agent in order to provide complete management functionality

SNMP - MIBs

MIB ID:

Any table (object) and any column / row of these tables has a unique name and a MIB ID No. inside the MIB tree

With the MIB ID No. a unique path through the MIB tree is given e.g. all PANDATEL tables can be found under 1.3.6.1.4.1.760

SNMP - General MIB Tree

PANDATEL Management - VT100 Basic Function

FH/FL

FO

GM-H

GM-S

BM-Z

G.703

HDSLVT100

ManagementStation

Mmgt.Card

Serial RS232 link

FH/FL

GM-H

GM-S

BM-Z

SubCard

RS485

FH/FL

GM-H

GM-S

BM-Z

SubCard

RS485

RS485

RS485

RS485

PANDATEL Management - Universal Rack System

PANDATEL Management - Active Management Components

PANDATEL Management - VT100 Basic Function

PANDATEL Management - VT100 Basic Features

Menu-driven VT100 management

Management of up to 48 rack cards and their remote units

maximum 96 units

DCE RS232 control port protected by password

Dial-up functionality

Standard management functions (e.g. loops, BERT)

Special management functions according to specific unit (e.g. CRC4, line speed adaption)

PANDATEL Management - VT100 Special Features

Event storage of last 256 system events (FIFO) Line status up / down I/F status up / down AIS Loop activation / deactivation

Bit-Error-Rate Testing Local unit generates bit pattern ( 2 x 10-15 ) Remote unit is set to line loop Local units generates bit-error report

Dial-up functionality Management card can be accesed via dial-up lines ( with dial-up

modem) Management card can be programmed to dial specific number in case

of alarm Dial-in is protected by password

PANDATEL Management - VT100 Special Features

SNMP basic setup

IP Address (e.g. 192.168.10.1)

Subnet (e.g. 255.255.255.0)

Five levels of access (SNMP = communities) protected by different passwords

Serial interface parameters (e.g. 9600 baud, 8 bit, no parity)

Up to 20 TRAP receivers can be programmed

PANDATEL Management - SNMP Basic Function

SNMPManagement

Station

FH/FL

FO

GM-H

GM-S

BM-Z

G.703

HDSL

Mmgt.Card FH/FL

GM-H

GM-S

BM-Z

SubCard

RS485

FH/FL

GM-H

GM-S

BM-Z

SubCard

RS485

RS485

RS485

RS485

SNMPSLIP / PPP or Ethernet

Translation

PANDATEL Management - SNMP Basic Application

PANDATEL Management - SNMP Special Features

Management Interface RS232 for SLIP or PPP with dial-up functionality 10BaseT for Ethernet protocol

Security Five different levels of access protected by different passwords Definition of up to 20 TRAP receivers

Management Functions same functionality as VT100 enhanced alarm (TRAP) messages enhanced supervision of line and I/F signals (e.g. RTS, DCD, AIS)